Question

I have a very big function in my model and I want to store it somewhere else in order to keep my model dry. I read that storing methods in ApplicationHelper and then calling them from a model is a bad idea. What is a good idea then?
I want to have a separate file with my big methods and call them from a model.

Answer 1

Use a Concern. https://gist.github.com/1014971

It’s simple. In app/models/concerns create a file your_functionality.rb as follows:

module YourFunctionality
  extend ActiveSupport::Concern

  def your_fat_method
    # insert...
  end
end

And in your model simply:

include YourFunctionality